Island



(N0 Mudel.) 2 Sheets-Sheet 1.

B. ARNOLD. ENDLESS CHAIN ELEVATOR.

No. 476,507. Patented June '7, 1892.

2 +u e e h S b e e h S 2 D L O ,N R A B a d 0 M 0 M ENDLESS CHAIN ELEVATOR.

No. 476,507. Patented June 7, 1892.

, III T a flvani'ar:

UNITED STATES PATENT OFFICE.

BENJAMIN ARNOLD, OF EAST GREENYVIOH, RHODE ISLAND.

ENDLESS-CHAIN ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 476,507, dated June '7, 1892.

Application filed April 5, 1892. Serial No. 427,801. (No model.)

To all whom it may concern:

Be it known that I, BENJAMIN ARNOLD, of East Greenwich, in the county of Kent and State of Rhode Island, have invented certain new and useful Improvements in Endless- Chain Elevators; andIdohereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention is an improvement on that described in my United States Letters Patent No. 465,313, dated December 15, 1891, though applicable to others using a movable frame or leg to accommodate its use to vessels, 85c. It is intended to avoid a difficulty found in using such elevators in bituminous coal, wet sand, iron ore, and other like compact material, which difficulty lies in making the elevatorleg penetrate or sink into the material sufficiently to allow the buckets to enter and scoop it up, owing to the resistance of the guardframes that project down below the end of the leg and out back and front of that part to protect the bucket from being injured by striking the hatchway of the vessel or cap-log of the wharf in being lowered or raised and when resting on the wharf. This object is accomplished by making the guard-frames movable on the elevator-leg, so that they can be raised at will suficiently to allow the buckets to project beyond the guard where they pass around at the lower end of the leg and enter the material to be raised. It also has the advantage of allowing the coal, &c., at the sides to fall more readily within the reach of the buckets and requires less shoveling to keep them supplied.

In the drawings, Figure 1 represents one side of the lower end of the elevator-leg with the guard-frame down in place to shield the buckets. Fig. 2 shows the same part of the elevator with the guard-frame raised to allow the buckets to project below it and reach the coal, &c. Fig. 3 shows a modification of the means for raising the guard-frame. Fig. 4:

shows the application of the invention to an elevator having a leg constructed of two beams, and also shows a modification of the means for raising the square frame.

A is the iron channel-beam, constituting a may be found best.

part of the side of the movable elevator frame or le B is a casting bolted securely to the beam A and constituting one of the bearings of the lower elevator-shaft e, that carries the pulleys a, around which the bucket-chains d pass.

D is a guard-frame, usually made of an angle-iron bent in a proper form to shield the ends of the buckets near the lower end of the frame A in back and front and as they pass around the lower pulleys. The frame D is secured to the beam Aby plates g and h. The lower plate g is of a T form, secured to the angle-iron part D by means of bolts passing through it and the flange of the angle-iron, and is controlled laterally by a stud s in the casting B, just above the bearing of the shaft 6, which stud projects into a slot in the plate g and slides therein when the guard-frame is raised or lowered on the beam A. The upper plate h is secured to the angle-iron D at both ends wit-l1 bolts and lies on the outer face of the beam A, sliding up and down in slots cut in the side flanges of the beam. That part of the plate It between the flanges of thebeam A has an oval opening 25 cut in it, and an eccentric f is placed in it, held on the end of a shaft or stud j, that has a bearing in the beam A.

In Fig. l the eccentric f is turned down in the oval opening in plate h, and the plate is consequently held down with the guard-frame D, so that the lower end of that frame extends down by the lowest bucket y and protects it. Now by turning the eccentric f a half-turn, as in Fig. 2, the plate h and frame D will be raised so that the bucket y will project down below the frame D and will not be held up by it from entering the coal, 8m. By raising the guard-frame more or less, as the eccentric may be turned, as much or as little of the buckets can be allowed to enter the coal as A screw-bolt i is inserted through the plate h and screwed into any one of a series of holes 2", made in the beam A, to hold the guard-frame at any point. The guard-frames on each side of the elevator are alike in construction, and the shaft j can be extended through both sides and have an eccentric secured to each end, so that the two guard-frames will work in unison.

In Fig. 3 a modification inthe means for raising the guard-frameis shown, using levers in place of the eccentric. The other parts of the elevator can be constructed as set forth in my Letters Patent before mentioned.

In Fig. 4 the manner of applying the improvement to an elevator employing two beams to form a side or leg to have a channel between them is shown. lhe plate h has two extensions that extend down to the guardframe atthe bottom and are bolted to it, and its upper end is bolted at each side to the angle-iron of the guard-frame D. The frame D maybe moved up or down on the leg-beams A in either of the ways shown in Figs. 1 and 3, or it may be operated by a screw 2%, fitted to screw through a nut s, bolted to a side flange of each of the beams and having its lower end revolubly attached to the plate h.

I claim as my invention In an endless-chain elevator, the combination, with the elevator-leg, of a guard-frame to shield the buckets, arranged to be moved to or from the end of the leg to protect or expose the buckets, and means for so moving it, substantially as herein set forth.

BENJ. ARNOLD.

lVitnesses:

S. L. LEETE, JAMES E. ARNOLD. 

